a survey on healthy choices was given to gym members at work it out. the results
showed that 90% of its members drank protein shakes. of the members who drank
protein shakes, 30% took weight-loss medication whereas only 10% of members
who did not drink protein shakes took weight-loss medication. what is the
probability that a gym member does not take weight-loss medication?
1) 0.28
2) 0.66
3) 0.63
4) 0.72